FR: Faderfox EC-4 support

[dna598]

Support is missing for the Faderfox EC-4.

This is a now long established controller that features 16 buttons, 16 encoders, and oled display in a small and convenient format.

Please kindly add support?

Sysex docs here: https://drive.google.com/file/d/1-BE3EkuZlK0EoNNAgTMPbkdhRSaDGWnL/view?usp=sharing

Thanks